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DeepSeek

DeepSeek V4 Flash

VS
xAI

Grok 4.20

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, Grok 4.20 is the premium intelligence choice, scoring 2.7% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: DeepSeek V4 Flash is 17.1x cheaper to run. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, DeepSeek V4 Flash offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of Grok 4.20 fully justifies the cost.

Model Specs

DeepSeek V4 Flash

Benchmarks & Scores

Coding (swe-bench-pro)
49.1%
Reasoning (gpqa-diamond)
80%

Cost & Performance

Cost (per 1M tokens)17.1x cheaper
$0.17Input: $0.14 | Output: $0.28
Speed
109.1 tps
Context Window
1M tokens
Model Specs

Grok 4.20

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+2.7%)
51.8%
Reasoning (gpqa-diamond)Winner (+10.0%)
90%

Cost & Performance

Cost (per 1M tokens)
$3.00Input: $2.00 | Output: $6.00
Speed2.1x faster
233 tps
Context Window
1M tokens
Read our data collection methodology

Frequently Asked Questions

DeepSeek V4 Flash is cheaper than Grok 4.20. DeepSeek V4 Flash has a blended cost of $0.17/1M tokens, which is about 17.1x cheaper than Grok 4.20 at $3.00/1M tokens.

Grok 4.20 is faster than DeepSeek V4 Flash. Grok 4.20 generates 233 tokens per second (tps) compared to DeepSeek V4 Flash which generates 109.1 tokens per second.

Grok 4.20 is better for coding tasks. It scores 51.8% on coding evaluations (swe-bench-pro) compared to DeepSeek V4 Flash which scores 49.1%.

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